CN2188152Y

CN2188152Y - Butterfly micro-resistance slow-closing check valve

Info

Publication number: CN2188152Y
Application number: CN 93229936
Authority: CN
Inventors: 杨文华
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-12-16
Filing date: 1993-12-16
Publication date: 1995-01-25
Anticipated expiration: 2003-12-16

Abstract

The utility model relates to a butterfly micro-resistance slow-closing check valve used in conveying lines of liquids. The butterfly micro-resistance slow-closing check valve is characterized in that two fixed sliding sleeves which are separate are axially arranged on the outer wall of a valve body; a sliding bar is installed in the fixed sliding sleeve, one end of the sliding bar has a shaft hole, and the other end of the slide bar has a screw thread. A spring is sheathed on the slide bar, and a spring adjustment nut is screwed. A swing which is hinged with the sliding bar is fixedly arranged at one end of a valve flap shaft. The butterfly micro-resistance slow-closing check valve has the advantages of reasonable design, simple structure, low cost, safe performance, convenient installation, maintenance and regulation, good close effect, etc., and the butterfly micro-resistance slow-closing check valve is suitable for conveying for all kinds of liquid mediums. The butterfly micro-resistance slow-closing check valve is free from limiting of the working environment.

Description

Butterfly micro-resistance slow-closing check valve

The utility model relates to a kind of Tiny Drag Slow Shut Check Valves that is used for liquid transmission pipeline.

It is reported, existing Tiny Drag Slow Shut Check Valves, its Slow Close mechanism all is hydraulic control slow closing mechanisms, this hydraulic control slow closing mechanism is that the liquid medium that pressure is arranged by the valve of flowing through enters in the Slow Close piston cylinder that is located on the valve body, the cylinder inner carrier is pushed out stretches to valve inner, when pump shut down, flap just can lean on the weight of self and the pressure of withdrawing fluid to drop on the piston, makes piston get back to the origin-location under controlled condition.This process be to do power source by the pressure of valve internal liquid medium, and this part liquid must flow into piston cylinder and get back to the once complete circulation of formation in the valve through the liquid in-out pipe valve.Valve is whenever closed once all once above-mentioned circulation.Therefore this kind valve only limits to use in the fluid pipeline that circulation is cleaned.The liquid medium of valve is to contain the water of impurity or other corrosive liquid etc. if flow through in the pipeline, directly enter in the piston cylinder, the control valve pipe will appear because of the existence of impurity in the liquid stopping up, pull piston/cylinder, the sealability of corrosion failure Slow Close mechanism, cause faults such as the Slow Close function is out of control, therefore limited the application of this class valve.In addition, during outdoor application, be water in the winter time as what carry in the pipeline, then very easily make the water freezing in the liquid in-out pipe of Slow Close mechanism, cause Slow Close mechanism ineffective.

The purpose of this utility model is, in order to overcome above-mentioned deficiency, provide a kind of have reasonable in design, simple in structure, cost is low, performance is safe and reliable, be convenient to installation and maintenance, regulation and control, be suitable for various conveying liquid mediums, be not subjected to the working environment restriction and close effective, high voltage bearing butterfly Tiny Drag Slow Shut Check Valves.

Technical solution of the present utility model is, carried the restriction of liquid medium and working environment in order to overcome valve, makes existing hydraulic control slow closing mechanism into machine control Slow Close mechanism.The amplitude of oscillation hinged with slide bar promptly is installed on the flap axle, and its slide bar is installed in and axially is located in two on the valve outer wall fixedly sliding sleeves that separate.On slide bar, be with spring, and be screwed with spring-adjusting nut.To close effect in order improving, and to make it can be high pressure resistant, flap is made periphery be the conical surface, and match with valve circle that internal diameter and flap peripheral shape adapt.In order to improve the sealing effect of flap and valve circle, having groove on the periphery of flap or on the internal diameter of valve circle, and be embedded with seal ring at groove.

The utility model compared with the prior art, owing to made the hydraulic control slow closing machinery of Tiny Drag Slow Shut Check Valves into machine control Slow Close mechanism, it not only simplifies the structure, reduced cost, and it is safe and reliable to have performance, is convenient to installation, maintenance, regulation and control and is not carried advantages such as liquid medium and working environment restriction.In addition, be the form that the conical surface contacts, therefore not only improved sealability, and improved withstand voltage properties owing to flap and valve circle have been made.

Below in conjunction with accompanying drawing, describe a specific embodiment of the present utility model in detail.

Fig. 1 is a structural representation of the present utility model.

Referring to Fig. 1, valve body 1 is one and has inlet/outlet, the valve body of mount inlet, mount inlet sealing cover 12 and flap axle axis hole.Sealing cover 12 is fastened to the mount inlet place by bolt 11.On the outer wall of valve body 1, be fastened with the fixedly sliding sleeve 14,17 that axially separates by screw 19.One end is housed in sliding sleeve 14,17 has the screwed slide bar 6 of axis hole 7, one ends.On slide bar 6, be with spring 15, and be screwed with spring-adjusting nut 16 and back of the body cap 18.End at flap axle 10 is equipped with by the amplitude of oscillation 9 of axostylus axostyle 8 with slide bar 6 hinge joints.The other end at flap axle 10 is equipped with weight linear meter 13.Internal diameter is housed in the inside of valve body 1 is conical surface periphery wall and has rectangle groove, and be embedded with the valve circle 3 of rubber seal 4 and the periphery that cooperates with the valve circle is the flap 2 that the conical surface has center bolt 20 at groove.Be equipped with the valve petal shelf 23 that has screw hole on flap axle 10, flap 2 is fastened on the valve petal shelf 23 by screw rod 20 and nut 21.On the periphery of flap 2, have rectangle groove, be embedded with rubber seal 5 at groove.

During use, at first adjust spring-adjusting nut according to the Yang Cheng situation.When pump started, flap was just being opened under the positive pressure of fluid and under the cooperation of weight linear meter smoothly.When pump quits work, the promotion flap that just can flow backwards of the liquid in the pipeline, flap is slowly closed under the reaction force of spring, thereby has reached the purpose of eliminating impact of water hammer.

Claims

1, a kind of butterfly Tiny Drag Slow Shut Check Valves, include and have into, outlet, mount inlet, the valve body [1] of mount inlet sealing cover [12] and flap axle axis hole, be located at the flap axle [10] in the axis hole, be located at the weight linear meter [13] on the flap axle [10], valve petal shelf [23], be located at the flap [2] on the valve petal shelf [23], be located at the valve circle [3] in the valve body [1], it is characterized in that on flap axle [10], being equipped with the amplitude of oscillation [9] with slide bar [6] hinge joint, slide bar [6] is installed in and axially is located at two on valve body [1] the outer wall fixedly sliding sleeves [14] that separate, [17] in, on slide bar [6], be with spring [15] and be screwed with spring-adjusting nut [16].

2, butterfly Tiny Drag Slow Shut Check Valves according to claim 1 is characterized in that said flap ［ 2 ］ is the flap that periphery is the conical surface, and matches with valve circle ［ 3 ］ that internal diameter and flap peripheral shape adapt.

3, butterfly Tiny Drag Slow Shut Check Valves according to claim 2 is characterized in that having groove on the periphery of flap ［ 2 ］ or on the internal diameter of valve circle ［ 3 ］, and is embedded with seal ring ［ 4 ］, ［ 5 ］ at groove.